Portable Sleep Study Device Versus Polysomnography: A Meta‐analysis

Abstract Objective To provide an updated comparison of apnea‐hypopnea index (AHI), oxygen desaturation index (ODI), respiratory disturbance index (RDI), oxygen saturation (O 2 sat), and lowest oxyhemoglobin saturation (LSAT) measured by portable sleep study devices (PSSDs) compared to polysomnography (PSG). Data Sources Primary studies were identified through PubMed, Scopus, CINAHL, and Cochrane. Review Methods A systematic review was performed by searching databases from inception through August 2021. Only studies examining simultaneous monitoring of a PSSD and PSG were included. Respiratory indices AHI, ODI, RDI, O 2 sat, and LSAT was collected Meta‐correlations and meta‐regressions were conducted to compare sleep variable measurements between PSSD and PSG. Results A total of 24 studies (N = 1644 patients) were included. The mean age was 49.5 ± 12.0 (range = 13‐92), mean body mass index (BMI) was 30.4 ± 5.7 (range = 17‐87), and 69.4% were male. Meta‐correlation showed significant associations between PSSD and PSG for AHI (n = 655, r = .888; p < .001), ODI (n = 241, r = .942; p < .001), RDI (n = 313, r = .832; p < .001), O 2 sat (n = 171, r = .858; p < .001), and LSAT (n = 197, r = .930; p < .001). Meta‐regressions indicated significant predictive correlations for AHI (n = 655; r = .96; p < .001), ODI (n = 740; r = .75; p = .031), RDI (n = 197; r = .99; p = .005), and LSAT (n = 197; r = .85; p = .030), but not for O 2 sat (n = 171; r = .31; p = .692). Conclusions Respiratory indices correlate strongly between PSSD and PSG, which is further supported by meta‐regressions results. PSSD might be a valuable cost and time‐saving OSA screening tool.